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Question 6 (2 points) Consider the rotation around the C2-C3 bond of 2-methylbutane. Using the values...
Show two different eclipsed and two different staggered conformtations of the molecule 2-methylbutane using the partial...
Show two different eclipsed and two different staggered
conformtations of the molecule 2-methylbutane using the partial
structures below and drawing in methyl groups where appropriate.
Underneath each calculate the total strain energy for each
structure given the torsional energies: [eclipsing H to H = 1 kcal,
H to CH3 = 1.5 kcal & CH3 to
CH3 = 4 kcal, and gauche CH3 to
CH3 = 0.9 kcal]. Then determine the barrier to rotation
around the C2-C3 bond in the
molecule....
The following graph is based on the free energy for C2-C3 bond rotation in butane obtained...
The following graph is based on the free energy for C2-C3 bond rotation in butane obtained by using CheMagic Virtual Molecular Model Kit C2-C3 Bond of Butane 30 25 20 15 10 0 180 300 360 10 15 20 -25」 Dihedral Angle Draw Newman projection of butane around C2-C3 bond for 60, 180° and 300° dihedral angles below (2 pt@ 180° 300° Which of the three energy minimum do not match exactly with the corresponding staggered configuration ie, 60. 180°...
Using the table below, calculate the difference in energy between a) the lowest energy conformations of...
Using the table below, calculate the difference in energy between a) the lowest energy conformations of cis- and trans-1,2-dimethylcyclohexane. b) the highest and lowest energy conformations of methyl cyclohexane, trans-1,2-dimethylcyclohexane and cis-1,3-dimethylcyclohexane Type of Strain Interaction Associated Energy Eclipsing of a pair of H's 4kj/mol Eclipsing of a H and a CH3 group 6kj/mol Eclipsing of a pair of CH3 groups 11kj/mol Gauche (60) Interactin between CH3 Groups 3.8 kj/mol 1,3 CH3 to H Interaction on Cyclohexane Chair 3.8kj/mol 1,3...
Specify the types of strain that destabilize the conformer shown below. Hint: All bonds not explicitly...
Specify the types of strain that destabilize the conformer shown below. Hint: All bonds not explicitly shown are in the staggered conformation. 1. Torsional strain 2. Angle (ring) strain 3. Steric (van der Waals) strain CH3 H H H. H CH3 Calculate strain energy for the conformer pictured below, using strain energy increments from the table. Strain Energy for Alkanes Interaction / Compound kJ/mol kcal/mol 4.0 1.0 H: H eclipsing H: CH3 eclipsing CH3 : CH3 eclipsing 5.8 1.4 11.0...
Consider the graph below, which is a plot of the relative energies of the various conformations...
Consider the graph below, which is a plot of the relative energies of the various conformations of 2,3-dimethylbutane, viewed through the C2-C3 bond. The conformations corresponding to the angles 120° and 240° are: 0° 60 120° 180° 240° 300 360° Angle of rotation A. eclipsed (one Me-Me and two Me-H eclipsed) B. eclipsed (one H-H and two Me-Me eclipsed) C. gauche D. anti-periplanar E. none of the above Enter Your Answer: Using the same graph and answer choices from question...
I already know how to do 1 and 2. if you could show me how to...
I already know how to do 1 and 2. if you could show me how to do
number 3 on the graph above, and how to calculate the expected
energy of the conformer please
1 60 120 180 240 300 360 Torsion angle (degrees) AE (kcal/mol) In the box below each molecule, draw Newman projections for the structures A, B, and C shown from the perspective indicated. For each Newman projection that you've drawn, indicate if there are any eclipsed...
Using Newman's casting patterns and taking into account the rotation around the C2-C3 binding, draw all...
Using Newman's casting patterns and taking into account the rotation around the C2-C3 binding, draw all the conformations alternating and opposite for: (a) butane b. 2-methylbutane c. 2,3-dimethylbutane For butane, indicate the anti-periplanar, anticlinical, synclinical and synperiplanar conformation. For 2,3-dimethylbutane, indicate the conformation in which the maximum number of methyl groups is in the anti-periplanar position and the conformation in which the maximum number of methyl groups is in the synperiplanar position.
Draw Newman Projections for 360 rotation around C3-C4 bond of 3-isopropylhexane. Label each structure as totally...
Draw Newman Projections for 360 rotation around C3-C4 bond of 3-isopropylhexane. Label each structure as totally eclipsed eclipsed, gauche or anti. Estimate the relative energy of each structure and draw the potential energy diagram | QUESTION 6 Complete the following acid-base reaction and estimate the equilibrium constant: 2 он H2C H2 H2 QUESTION 7 If a solution of a pair of enantiomers has a measured rotation of +15°, and the pure S enantiomer has a specific rotation of +25°, what...
XIII. Below is the potential energy diagram versus the dihedral angle of rotation for 2-methylbutane. Rotation...
XIII. Below is the potential energy diagram versus the
dihedral angle of rotation for 2-methylbutane. Rotation takes place
around the C2-C3 bond.
1. Draw alternate and clipped Newman projections in the space
provided. (6 points)
NOTE: the front carbon is carbon 2
2. Explain the difference in energy between conformers A and
B. (2 points)
111. A continuación aparece el diagrama de energía potencial versus el ángulo dihedral de rotacion para 2-metilbutano. La rotación se lleva a cabo alrededor del...
x Consider 2,2,3-trimethylbuttane. Using a Newman projection formula, draw the most stable conformation, sighting along the...
x Consider 2,2,3-trimethylbuttane. Using a Newman projection formula, draw the most stable conformation, sighting along the C2-C3 bond. Compute the total strain energy for this conformation. Refer to strain energy values given below. Strain energies with respect to atoms/groups bonded to C-C (one atom/group bonded to each C) H <---> H eclipsed: 4 kJ/mol CH3 <---> H eclipsed: 6 kJ/mol CH3 <----> CH3 eclipsed: 11 kJ/mol CH3 <----> CH3 gauche staggered: 3.8 kJ/mol Selected Answer: D. 7.6 kJ/mol Answers: A....
Show two different eclipsed and two different staggered
conformtations of the molecule 2-methylbutane using the partial
structures below and drawing in methyl groups where appropriate.
Underneath each calculate the total strain energy for each
structure given the torsional energies: [eclipsing H to H = 1 kcal,
H to CH3 = 1.5 kcal & CH3 to
CH3 = 4 kcal, and gauche CH3 to
CH3 = 0.9 kcal]. Then determine the barrier to rotation
around the C2-C3 bond in the
molecule....
The following graph is based on the free energy for C2-C3 bond rotation in butane obtained by using CheMagic Virtual Molecular Model Kit C2-C3 Bond of Butane 30 25 20 15 10 0 180 300 360 10 15 20 -25」 Dihedral Angle Draw Newman projection of butane around C2-C3 bond for 60, 180° and 300° dihedral angles below (2 pt@ 180° 300° Which of the three energy minimum do not match exactly with the corresponding staggered configuration ie, 60. 180°...
Specify the types of strain that destabilize the conformer shown below. Hint: All bonds not explicitly shown are in the staggered conformation. 1. Torsional strain 2. Angle (ring) strain 3. Steric (van der Waals) strain CH3 H H H. H CH3 Calculate strain energy for the conformer pictured below, using strain energy increments from the table. Strain Energy for Alkanes Interaction / Compound kJ/mol kcal/mol 4.0 1.0 H: H eclipsing H: CH3 eclipsing CH3 : CH3 eclipsing 5.8 1.4 11.0...
Consider the graph below, which is a plot of the relative energies of the various conformations of 2,3-dimethylbutane, viewed through the C2-C3 bond. The conformations corresponding to the angles 120° and 240° are: 0° 60 120° 180° 240° 300 360° Angle of rotation A. eclipsed (one Me-Me and two Me-H eclipsed) B. eclipsed (one H-H and two Me-Me eclipsed) C. gauche D. anti-periplanar E. none of the above Enter Your Answer: Using the same graph and answer choices from question...
I already know how to do 1 and 2. if you could show me how to do
number 3 on the graph above, and how to calculate the expected
energy of the conformer please
1 60 120 180 240 300 360 Torsion angle (degrees) AE (kcal/mol) In the box below each molecule, draw Newman projections for the structures A, B, and C shown from the perspective indicated. For each Newman projection that you've drawn, indicate if there are any eclipsed...
Draw Newman Projections for 360 rotation around C3-C4 bond of 3-isopropylhexane. Label each structure as totally eclipsed eclipsed, gauche or anti. Estimate the relative energy of each structure and draw the potential energy diagram | QUESTION 6 Complete the following acid-base reaction and estimate the equilibrium constant: 2 он H2C H2 H2 QUESTION 7 If a solution of a pair of enantiomers has a measured rotation of +15°, and the pure S enantiomer has a specific rotation of +25°, what...
XIII. Below is the potential energy diagram versus the
dihedral angle of rotation for 2-methylbutane. Rotation takes place
around the C2-C3 bond.
1. Draw alternate and clipped Newman projections in the space
provided. (6 points)
NOTE: the front carbon is carbon 2
2. Explain the difference in energy between conformers A and
B. (2 points)
111. A continuación aparece el diagrama de energía potencial versus el ángulo dihedral de rotacion para 2-metilbutano. La rotación se lleva a cabo alrededor del...
x Consider 2,2,3-trimethylbuttane. Using a Newman projection formula, draw the most stable conformation, sighting along the C2-C3 bond. Compute the total strain energy for this conformation. Refer to strain energy values given below. Strain energies with respect to atoms/groups bonded to C-C (one atom/group bonded to each C) H <---> H eclipsed: 4 kJ/mol CH3 <---> H eclipsed: 6 kJ/mol CH3 <----> CH3 eclipsed: 11 kJ/mol CH3 <----> CH3 gauche staggered: 3.8 kJ/mol Selected Answer: D. 7.6 kJ/mol Answers: A....
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